EOL for Rails < 5.2 and Ruby < 2.3.0

[pustovalov]

Ruby

https://endoflife.software/programming-languages/server-side-scripting/ruby

Ruby 2.2
Release date
December 25, 2014

End of life
March 31, 2018

Ruby 2.3
December 25, 2015 - March 31, 2019

Ruby 2.4
December 25, 2016 - March 31, 2020

Rails

Rails 6
Release date
Aug 16, 2019
https://github.com/rails/rails/releases/tag/v6.0.0

https://guides.rubyonrails.org/maintenance_policy.html

For severe security issues all releases in the current major series, and also the last release in the previous major series will receive patches and new versions. The classification of the security issue is judged by the core team.
Currently included series: 6.0.Z, 5.2.Z.

[smondal]

I think we should wait until end of life date reached. Lots of application still using Rails 4.2.

[rafaelfranca]

I think we should wait until end of life date reached. Lots of application still using Rails 4.2.

It was reached a few months back when Rails 6.0.0 was released.

[connorshea]

Rails 5.0 and 5.1 were also EOL'd, for what it's worth.

Also, we should probably add Ruby 2.7 to the CI test matrix?

[pustovalov]

before:

Ran for 20 min
Total time 48 min 5 sec

after:

Ran for 10 min 41 sec
Total time 23 min 3 sec

[pustovalov]

@gauravtiwari can you also check this PR?

[gauravtiwari]

thanks @pustovalov